On a Normal Curve,95 Percent of All the Cases Would

question 63

Multiple Choice

On a normal curve,95 percent of all the cases would be found between which two standard deviations (SDs) ?

• A)0 and +3
• B)-1 and +1
• C)-2 and +2
• D)-3 and +3

---

Definitions:

Quantifier Negation

The process of applying negation to a quantified statement, potentially altering its meaning significantly.

Universal Generalization

A form of logical inference where a general statement is made about all members of a set based on sufficient evidence or instances.

Existential Instantiation

A logical operation that infers the existence of at least one individual satisfying a particular property from a general statement.

Universal Instantiation

A logical rule of inference that allows one to deduce a particular instance from a universal statement, essentially moving from a general statement to a specific example.